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Finding the Fourth Proportional to 103,951.27, 143,489.61 and 61,509.70

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Solution

The fourth proportional to 103,951.27, 143,489.61 and 61,509.70 is: 84,905.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,951.27 : 143,489.61 = 61,509.70 : x
  2. Step 2: Convert to fraction form
    103,951.27/143,489.61 = 61,509.70/x
  3. Step 3: Cross multiply
    103,951.27x = 143,489.61 × 61,509.70
  4. Step 4: Simplify right side
    103,951.27x = 8,826,002,146.77
  5. Step 5: Solve for x
    x = 8,826,002,146.77/103,951.27
  6. Step 6: Final answer
    x = 84,905.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.